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Class Information
Number: 381/116
Name: Electrical audio signal processing systems and devices > Circuitry combined with specific type microphone or loudspeaker > With electrostatic loudspeaker
Description: Subject matter where the transducer is an electrostatic loudspeaker.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7536769 |
Method of fabricating an acoustic transducer |
May. 26, 2009 |
| 7505600 |
Processor control of an audio transducer |
Mar. 17, 2009 |
| 7447318 |
System for using digital signal processing to compensate for power compression of loudspeakers |
Nov. 4, 2008 |
| 7443990 |
Voltage biased capacitor circuit for a loudspeaker |
Oct. 28, 2008 |
| 7321661 |
Current feedback system for improving crossover frequency response |
Jan. 22, 2008 |
| 7308750 |
Method of manufacturing a magnesium diaphragm |
Dec. 18, 2007 |
| 7305750 |
Method of assembling a loudspeaker |
Dec. 11, 2007 |
| 7278200 |
Method of tensioning a diaphragm for an electro-dynamic loudspeaker |
Oct. 9, 2007 |
| 7216417 |
Method for manufacturing an electromechanical sensor element |
May. 15, 2007 |
| 7210213 |
Method for manufacturing a dynamic speaker |
May. 1, 2007 |
| 7180225 |
Piezoelectric vibrator |
Feb. 20, 2007 |
| 7152299 |
Method of assembling a loudspeaker |
Dec. 26, 2006 |
| 7146011 |
Steering of directional sound beams |
Dec. 5, 2006 |
| 7106880 |
Universal ribbon element-module for two or more membrane-widths with optimized flow and drive |
Sep. 12, 2006 |
| 7062055 |
Elastomeric dielectric polymer film sonic actuator |
Jun. 13, 2006 |
| 7054456 |
Invertedly driven electrostatic speaker |
May. 30, 2006 |
| 6996891 |
Method for the manufacture of a sensor element |
Feb. 14, 2006 |
| 6925187 |
Horn array emitter |
Aug. 2, 2005 |
| 6915555 |
Method for manufacturing speaker |
Jul. 12, 2005 |
| 6914991 |
Parametric audio amplifier system |
Jul. 5, 2005 |
| 6842964 |
Process of manufacturing of electrostatic speakers |
Jan. 18, 2005 |
| 6817084 |
Method for manufacturing a speaker apparatus |
Nov. 16, 2004 |
| 6771785 |
Ultrasonic transducer for parametric array |
Aug. 3, 2004 |
| 6725109 |
Sound generator circuit system and method |
Apr. 20, 2004 |
| 6718040 |
Transformer, loudspeaker device, loudspeaker network, and loudspeaker system |
Apr. 6, 2004 |
| 6678383 |
Capacitor microphone |
Jan. 13, 2004 |
| 6639988 |
Piezo integrated flat speakers for automotive interior panels |
Oct. 28, 2003 |
| 6483924 |
Acoustic elements and method for sound processing |
Nov. 19, 2002 |
| 6459799 |
Modularly expandable electrostatic speaker system |
Oct. 1, 2002 |
| 6396933 |
High-fidelity and high-efficiency analog amplifier combined with digital amplifier |
May. 28, 2002 |
| 6343129 |
Elastomeric dielectric polymer film sonic actuator |
Jan. 29, 2002 |
| 6188772 |
Electrostatic speaker with foam stator |
Feb. 13, 2001 |
| 6044160 |
Resonant tuned, ultrasonic electrostatic emitter |
Mar. 28, 2000 |
| 5894452 |
Microfabricated ultrasonic immersion transducer |
Apr. 13, 1999 |
| 5870351 |
Broadband microfabriated ultrasonic transducer and method of fabrication |
Feb. 9, 1999 |
| 5619476 |
Electrostatic ultrasonic transducer |
Apr. 8, 1997 |
| 5471540 |
Electrostatic loudspeaker having stationary electrodes formed as multiple sheets insulated from each other |
Nov. 28, 1995 |
| 5388163 |
Electret transducer array and fabrication technique |
Feb. 7, 1995 |
| 5264656 |
Electronic sound generating device |
Nov. 23, 1993 |
| 5153914 |
Sound equipment system |
Oct. 6, 1992 |
| 5097513 |
Speaker system enclosure integrated with amplifier circuit board |
Mar. 17, 1992 |
| 4955059 |
Speaker power matching method and apparatus |
Sep. 4, 1990 |
| 4799265 |
Electrostatic transducer unit |
Jan. 17, 1989 |
| 4654546 |
Electromechanical film and procedure for manufacturing same |
Mar. 31, 1987 |
| 4515997 |
Direct digital loudspeaker |
May. 7, 1985 |
| 4481663 |
Network for use with piezoceramic transducer |
Nov. 6, 1984 |
| 4464785 |
Loudspeaker system |
Aug. 7, 1984 |
| 4323736 |
Step-up circuit for driving full-range-element electrostatic loudspeakers |
Apr. 6, 1982 |
| 4289936 |
Electrostatic transducers |
Sep. 15, 1981 |
| 4286122 |
Acoustic electrical conversion device with at least one capacitor electret element connected to an electronic circuit |
Aug. 25, 1981 |
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